Class 9 Science — Chapter 15: Earth as a System: Energy, Matter & Life
90 practice questions · 30 Easy · 30 Medium · 30 Hard
Practise Class 9 Science Chapter 15, "Earth as a System: Energy, Matter & Life", with 90 NCERT-aligned multiple-choice questions. The set is split into 30 Easy, 30 Medium and 30 Hard questions, so you can warm up on the fundamentals and then push into the exam-level problems that separate top scorers in CBSE Board exams and the JEE & NEET foundation years.
"Earth as a System: Energy, Matter & Life" is one of the chapters where concept clarity across physics, chemistry and biology basics really pays off. Each MCQ on this chapter is timed and uses exam-grade marking (+2 correct, −1 wrong, 0 skipped), training the same accuracy-under-pressure that real papers demand. Every question carries a short explanation, so a wrong answer becomes a quick lesson rather than a dead end — the fastest way to close gaps before a test.
Use this chapter as targeted revision: attempt the Easy set first to confirm your basics on Earth as a System: Energy, Matter & Life, then move to Medium and Hard to test application and problem-solving. Your accuracy, streaks and XP save automatically, and the chapter feeds into your overall Class 9 Science mastery score. A few sample questions are shown below; sign in free to practise all 90.
Sample questions
Oxygen makes up approximately what percentage of the air?
About 21% of the atmosphere is oxygen.
The equator receives more heat than the poles because there the Sun's rays fall:
Near the equator sunlight strikes almost vertically, concentrating heat on a smaller area.
Why is the equator much warmer than the poles?
Because the Earth is curved, equatorial rays are concentrated on a small area, while polar rays strike at a slant and spread out, giving less heat per unit area.
Earth as a System: Energy, Matter & Life — FAQs
What does Class 9 Science Chapter 15 (Earth as a System: Energy, Matter & Life) cover on XamBaaz?+
It covers 90 NCERT-aligned MCQs on "Earth as a System: Energy, Matter & Life" — 30 Easy, 30 Medium and 30 Hard — each with a timed quiz and an instant explanation, suitable for CBSE Board exams and the JEE & NEET foundation years.
Are these "Earth as a System: Energy, Matter & Life" questions free to practise?+
Yes — sign in with Google to practise "Earth as a System: Energy, Matter & Life" free. Full unlimited access is ₹999/year (limited-time launch price), with no per-chapter charges.
How should I revise "Earth as a System: Energy, Matter & Life" for the exam?+
Start with the Easy quiz to confirm your fundamentals, then attempt Medium and Hard for application-level practice. Review each explanation, retry the questions you miss, and track your accuracy on this chapter until it is consistently high.
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